Copycat Smashburger French Onion Burger Recipes

Steps:

• Heat a griddle or large cast-iron skillet over medium heat for at least 10 minutes. Meanwhile, combine the mayonnaise, mustard and pickle brine in a small bowl. Combine the onion powder, garlic powder, paprika, 1/2 teaspoon salt and 1/4 teaspoon pepper in a separate small bowl. Set aside.
• Loosely form the beef into 4 balls; set aside. Working in batches, lightly brush the griddle with butter and toast the buns cut-side down until lightly browned, 1 to 2 minutes. Transfer to a plate.
• Brush the griddle with more butter and add 1 ball of beef. Press firmly with 2 large crisscrossed metal spatulas for exactly 10 seconds, then gently remove the spatulas. Sprinkle the patties with some of the seasoning mixture and continue cooking, undisturbed, until well browned, 1 1/2to 2 minutes. (Start cooking another burger at this point.) Flip the patty, sprinkle with more of the seasoning mixture and top with 1 cheese slice. Continue cooking until the cheese is melted around the edges and the bottom of the burger is browned, about 1 more minute. Repeat with the remaining beef.
• Spread the mayonnaise mixture on the bun tops and add some ketchup. Serve the patties on the buns with the pickles, tomato, red onion and lettuce.